Table 2: PL peaks obtained after Gaussian fit of the data at various substrate temperatures.

Substrate temperature (°C)Location of PL peaks (nm)

RT (23)392, 419,a 434, 458
150397, 426,b 444, 467,d 484
300389, 419,a 435, 467,d 489
450395, 421,a 435, 456,c 602c
600377, 402, 467d

Due to interstitial oxygen [32], bdue to the interstitial Zn [32], cdue to oxygen vacancies [28], dblue-green emission [27].